<template>
    <el-container class="home-container">
        <el-header>
            <div>
                <img src="../assets/logo1.png" alt="">
                <span>电商后台管理系统</span>            
            </div>
            <el-button type="info" @click="logout">退出</el-button></el-header>
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-botton" @click="toggleCollapse()">|||</div>
                <!-- 侧边栏菜单区 -->
                <!-- router 开启路由模式 ，二级菜单的index属性定义的是跳转路由 -->
                 <el-menu
                    background-color="#333744"
                    text-color="#fff"
                    active-text-color="#409eff"
                    unique-opened :collapse="isCollapse" :collapse-transition='false' :router="true"
                    :default-active='activePath'>
                    <!--一级菜单 -->
                    <!-- 动态绑定唯一的index值，点击展开一级菜单时，只展开当前的菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
                        <!-- 一级菜单模板区 -->
                        <template slot="title">
                            <i :class="iconsObj[item.id]"></i>
                            <span>{{item.authName}}</span>
                        </template>
                       <!-- 二级菜单 -->
                        <el-menu-item v-for="subItem in item.children" :key="subItem.id" :index="'/' + subItem.path" @click="saveNavState('/' + subItem.path)">
                            <template slot="title">
                                <i class="el-icon-menu"></i>
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data() {
        return {
            // 左侧菜单数据
            menuList: [],
            iconsObj: {
                '125': 'iconfont icon-gerenzhongxin',
                '103': 'iconfont icon-yanzhengma3',
                '101': 'iconfont icon-liebiao2',
                '102': 'iconfont icon-wodedingdan2',
                '145': 'iconfont icon-liebiao1'
            },
            // 默认菜单不折叠
            isCollapse: false,
            // 被激活的链接地址
            activePath: ''
        }
    },
    created() {
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },    
    methods: {
        // 退出登录
        logout() {
        window.sessionStorage.clear()
        this.$router.push('/login')
        },
        // 获取所有的菜单
        async getMenuList() {
            // 请求返回premise对象，使用async和await简化操作
            const { data: res } = await this.$http.get('menus') 
            if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menuList = res.data
            console.log(res);
        },
        // 点击实现菜单的折叠
        toggleCollapse() {
            this.isCollapse = !this.isCollapse
        },
        saveNavState(activePath) {
            window.sessionStorage.setItem('activePath', activePath)
            this.activePath = activePath
        }
    }
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    >div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: 0;
    }
}
.el-main{
    background-color: #eaedf1;
}
.iconfont{
    margin-right: 10px;
}
.toggle-botton{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: .2em;
    cursor: pointer;
}
</style>
